Balaji Engneering Co. Manufactures Concentricity Tester with "V" Shaped Knife Edges. Balaji Engneering Co. Is the supplier of plant semi automatic machineries. Concentricity Tester with "V" Shaped Knife Edges is used to check the concentricity of the flux coating with respect to the core wire. Concentricity Tester with "V" Shaped Knife Edges has anvil on the base of a microscope over which the electrode is kept and rolled. The connectivity values of the tester are read through microscope.